package com.atguigu.dao;

/**
 * @version 1.0
 * @Author 马冰
 * @Date 2024/12/20 20:05
 * @注释
 */
public interface BookDao {
    Integer findPriceByBookId(int bookId);

    void updataStock(int bookId);

    void updateBalance(int userId, Integer price);

}
